4μ8摄氏度产品是4µ8C is a selective inhibitor of IRE1α ribonuclease (RNase) activity (IC₅₀ = 60 nM). It blocks substrate access to the active site of IRE1α and inactivates IRE1α-mediated mRNA degradation. Displays no effect on the IRE1α-related endoribonuclease RNase L.